Switch to casbah 2.5.0 release
Merge branch 'salat_2.10.RC3' of github.com:kahliburke/salat into salat_2.10.RC3

* 'salat_2.10.RC3' of github.com:kahliburke/salat:
  removed SNAPSHOT from org.mongoidb:casbash:2.5.0 (the SNAPSHOT disappearied from oss repos)